![]() ![]() (He passed away in 2002 at age 91.) Stare was one of the first to recommend that humans consume six or so 12-ounce glasses of water a day. Stare, an influential 21st century nutritionist and founding chairman of the department of nutrition at the Harvard School of Public Health. The idea may have been at least partly put forth by Frederick J. The academy spuriously suggested that "2,500 mL of fluid should be ingested on a daily basis," although a primary clinical study was never actually cited. ![]() So where exactly did this eight glasses of water a day voodoo come from? The very idea of a "minimal water requirement" is actually a fairly recent notion that first appeared in dietary guidelines published in 1945 by the Food and Nutrition Board of the National Academy of Sciences. Even something like, say, a baked potato, is 75 percent water. Even though we're told it's important to drink eight glasses of water a day, "there's no evidence that benefits health in any real way and it really represents an urban myth," says Goldfarb. Stanley Goldfarb, a nephrologist (kidney researcher) at the University of Pennsylvania. Despite the widely held notion that tea and coffee dehydrate us, they actually count toward our overall water intake, says Dr. ![]() You and I, on the other hand, may get a bit cranky in our air-conditioned offices if we forget to visit the water cooler for a morning, but it's highly, highly, highly improbable that we'd shrivel and die at the dusty hands of the dehydration monster. Saharan nomads, for example, are capable of subsisting on very little water for days at a time in one of Earth's most hellish climates, as was first noted in 1976 by anthropologist Claude Paque. Set aside the entangled interests of Big Bottled Water, and you'll see that study after study continues to show that the human body is remarkably resilient when it comes to quenching our thirst. Under the company's expansive culinary umbrella? Volvic, Evian, and Badoit bottled waters. In fact, many of the groups behind the public push for over-hydration have been exposed as having - surprise! - monetary interests in the fluid industry.įor example: In a 2011 article published in the British Medical Journal, Margaret McCartney debunked the eight glasses a day myth and noted that one water advocacy group in Europe, Hydration for Health, is not only sponsored by, but was actually created by food giant Danone. Liter to Cup (US) Conversion Table Liter ġ5 L, l = 15 × 4.2267528377 cup (US) = 63.But health researchers have refuted the eight-glasses-a-day claim as a silly myth riding a wave of flimsy scientific literature. Standardized measuring cups are used instead. Actual drinking cups can vary significantly in terms of size and are generally not a good representation of this unit. customary teaspoons.Ĭurrent use: The cup is typically used in cooking to measure liquids and bulk foods, often within the context of serving sizes. One United States customary cup is equal to 236.5882365 milliliters as well as 1/16 U.S. The metric cup is defined as 250 milliliters. Cup (US)ĭefinition: A cup is a unit of volume in the imperial and United States customary systems of measurement. It is also used to measure certain non-liquid volumes such as the size of car trunks, backpacks and climbing packs, computer cases, microwaves, refrigerators, and recycling bins, as well as for expressing fuel volumes and prices in most countries around the world. However, due to the mass-volume relationship of water being based on a number of factors that can be cumbersome to control (temperature, pressure, purity, isotopic uniformity), as well as the discovery that the prototype of the kilogram was slightly too large (making the liter equal to 1.000028 dm 3 rather than 1 dm 3), the definition of the liter was reverted to its previous, and current definition.Ĭurrent use: The liter is used to measure many liquid volumes as well as to label containers containing said liquids. History/origin: There was a point from 1901 to 1964 when a liter was defined as the volume of one kilogram of pure water under the conditions of maximum density at atmospheric pressure. One liter is equal to 1 cubic decimeter (dm 3), 1,000 cubic centimeters (cm 3), or 1/1,000 cubic meters (m 3). ![]() Definition: A liter (symbol: L) is a unit of volume that is accepted for use with the International System of Units (SI) but is technically not an SI unit. ![]()
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